<template>
  <div class="app-container">
  <h2 style="text-align: center">发布新课程</h2>
  <el-steps
    :active="2"
    process-status="wait"
    align-center
    style="margin-bottom: 40px;"
  >
    <el-step title="填写课程基本信息" />
    <el-step title="创建课程大纲" />
    <el-step title="最终发布" />
  </el-steps>
    <el-button type="text" @click="openChapterDialog">添加章节</el-button>
    <!-- 章节 -->
    <ul class="chanpterList">
      <li
        v-for="chapter in chapterVideoList"
        :key="chapter.id">
        <p>
          {{ chapter.title }}

          <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
          </span>
        </p>

        <!-- 小节 -->
        <ul class="chanpterList videoList">
          <li
            v-for="video in chapter.children"
            :key="video.id">
            <p>{{ video.title }}

              <span class="acts">

                    <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>

    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next"
      >下 一步</el-button
      >
    </div>
    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title"/>
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>
    <!--添加小节表单-->
    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title" />
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number
            v-model="video.sort"
            :min="0"
            controls-
            position="right"
          />
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.isFree">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API + '/eduvod/video/uploadAlyVideo'"
            :limit="1"
            class="upload-demo"
          >
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <div slot="content">
                最大支持1G，<br />
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br />
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br />
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br />
                SWF、TS、VOB、WMV、WEBM 等视频格式上传
              </div>
              <i class="el-icon-question" />
            </el-tooltip>
          </el-upload>
        </el-form-item>

      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button
          :disabled="saveVideoBtnDisabled"
          type="primary"
          @click="saveOrUpdateVideo(video.id)"
        >确 定</el-button
        >
      </div>
    </el-dialog>

  </div>
</template>

<script>
import chapter from '../../../api/chapter/chapter'
import video from '../../../api/video/video'
  export default {
    data(){
      return{
        saveBtnDisabled:false,
        courseId:"",//课程id
        chapterVideoList:[],
        chapter:{//封装章节数据
          title:'',
          sort:0,
        },
        video:{
          title:'',
          sort:0,
          isFree:0,
          videoSourceId:'',
          videoOriginalName:'',
        },
        dialogChapterFormVisible:false,//章节弹框
        dialogVideoFormVisible : false,//小节弹框

        fileList: [], //上传文件列表
        BASE_API: process.env.BASE_API, // 接口API地址

      }
    },
    created() {
      //获取路由的id值
      if(this.$route.params&&this.$route.params.id){
        this.courseId = this.$route.params.id;
        this.getChapterVideo();
      }
    },
    methods:{
//=====================================小节操作=====================================================
      //点击x调用这个方法
      beforeVodRemove(file,fileList){
        return this.$confirm(`确定移除 ${file.name}？`);
      },
      //点击确定调用的方法
      handleVodRemove(){
        video.deleteAlyVideo(this.video.videoSourceId)
        .then(resp=>{
          //提示信息
          this.$message({
            type: "success",
            message: "删除视频成功!",
          });
          //把文件列表清空
          this.fileList = [];
          //清空视频id赋值
          this.video.videoSourceId = '';
          //清空视频名称赋值
          this.video.videoOriginalName = '';
        })
      },
      //上传视频成功调用方法
      handleVodUploadSuccess(response,file,fileList){
        //上传视频id赋值
        this.video.videoSourceId = response.data.videoId;
        //上传视频名称赋值
        this.video.videoOriginalName = file.name;
      },
      //重新上传
      handleUploadExceed(){
        this.$message.warning('想要重新上传视频，请先删除已上传的视频')
      },
      //删除小节
      removeVideo(videoId){
        this.$confirm("此操作将永久删除小节信息, 是否继续?", "提示", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }).then(() => {
          //点击确定，执行then方法
          video.deleteVideo(videoId).then((resp) => {
            //删除成功
            //提示信息
            this.$message({
              type: "success",
              message: "删除成功!",
            });
            //刷新页面
            this.getChapterVideo();
          });
        });
      },
      //添加小节弹框的方法
      openVideo(chapterId){
          //弹框
        this.dialogVideoFormVisible = true;


        //表单数据清空
        this.video={}
        //设置章节id
        this.video.chapterId = chapterId;
        //把文件列表清空
        this.fileList = [];
        //清空视频id赋值
        this.video.videoSourceId = '';
        //清空视频名称赋值
        this.video.videoOriginalName = '';

      },
      //修改小节弹框的方法
      openEditVideo(videoId){
        //弹框
        this.dialogVideoFormVisible = true;
        //使用videoId查找数据
        video.getVideoById(videoId)
        .then(resp=>{
          this.video = resp.data.video;
        })
      },
      //添加小节
      addVideo(){
        //设置课程ID
        this.video.courseId = this.courseId;
        video.addVideo(this.video)
        .then(resp=>{
          //关闭弹框
          this.dialogVideoFormVisible = false;
          //提示信息
          this.$message({
            type: "success",
            message: "添加小节成功!",
          });
          //刷新页面
          this.getChapterVideo();
        })
      },
      //修改小节
      updateVideo(){
        video.updateVideo(this.video)
        .then(resp=>{
          //关模态框
          this.dialogVideoFormVisible=false;
          //提示信息
          this.$message({
            message: "修改小节信息成功",
            type: "success",
          })
          //刷新页面
          this.getChapterVideo();
        })
      },
      saveOrUpdateVideo(){
        if(!this.video.id){
          this.addVideo();
        }
        else{
          this.updateVideo();
        }
      },
//=====================================章节操作=====================================================
      //删除章节
      removeChapter(chapterId){
        this.$confirm("此操作将永久删除章节信息, 是否继续?", "提示", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }).then(() => {
          //点击确定，执行then方法
          chapter.deleteById(chapterId).then((resp) => {
            //删除成功
            //提示信息
            this.$message({
              type: "success",
              message: "删除成功!",
            });
            //刷新页面
            this.getChapterVideo();
          });
        });
      },

      //打开编辑页面
      openEditChatper(chapterId){
        this.dialogChapterFormVisible = true
        //显示该id下的章节信息
        chapter.getChapterById(chapterId)
        .then(resp=>{
            this.chapter = resp.data.chapter;
        })
      },

      //弹出添加章节页面
      openChapterDialog(){
        //弹框
        this.dialogChapterFormVisible = true
        //表单数据清空
        this.chapter.title = ''
        this.chapter.sort = 0
      },
      //添加章节
      addChapter(){
        //设置课程id到chapter对象前面
        this.chapter.courseId = this.courseId;
        chapter.addChapter(this.chapter)
          .then(resp=>{
            //关模态框
            this.dialogChapterFormVisible=false;
            //提示信息
            this.$message({
              message: "添加章节信息成功",
              type: "success",
            })
            //刷新页面
            this.getChapterVideo();
          })
      },
      //修改章节
      updateChapter(){
        chapter.updateChapter(this.chapter)
        .then(resp=>{
          //关模态框
          this.dialogChapterFormVisible=false;
          //提示信息
          this.$message({
            message: "修改章节信息成功",
            type: "success",
          })
          //刷新页面
          this.getChapterVideo();
        })
      },
      saveOrUpdate(){
        if(!this.chapter.id){
          this.addChapter();
        }
        else{
          this.updateChapter();
        }
      },
      //根据课程id查询章节和小节
      getChapterVideo(){
        chapter.getAllChapterVideo(this.courseId)
        .then(resp=>{
          console.log(resp.data.allChapterVideo)
          this.chapterVideoList = resp.data.allChapterVideo;
        })
      },
      previous(){
        this.$router.push({path:"/course/info/"+this.courseId})
      },
      next:function() {
        //跳转到第二步
        this.$router.push({path:'/course/publish/'+this.courseId});
      }
    },


  }
</script>
<style scoped>
  .chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
  }
  .chanpterList li{
    position: relative;
  }
  .chanpterList p{
    float: right;
    font-size: 20px;
    margin: 10px 0;
    padding: 10px;
    height: 70px;
    line-height: 50px;
    width: 100%;
    border: 1px solid #DDD;
  }
  .chanpterList .acts {
    float: right;
    font-size: 14px;
  }

  .videoList{
    padding-left: 50px;
  }
  .videoList p{
    float: left;
    font-size: 14px;
    margin: 10px 0;
    padding: 10px;
    height: 50px;
    line-height: 30px;
    width: 100%;
    border: 1px dotted #DDD;
  }

</style>
